President Trump reacted with anger to reports that text messages between two FBI officials in the days after his 2016 presidential victory may show “irregularities” in how the Russia investigation began, calling it evidence of a “coup.”

Trump made the statement during a phone interview with Sean Hannity on Fox News Friday night while responding to a question about the messages exchanged between FBI agent Peter Strzok and former Justice Department attorney Lisa Page.

“They were trying to infiltrate the administration,” Trump told Sean Hannity. “Really, it’s a coup. It’s spying. It’s hard to believe in this country we would have had that.”

Republican Senators Chuck Grassley and Ron Johnson are hoping to investigate the texts further and they both sent a letter to Attorney General Bill Barr, asking for more information.

“Any improper FBI surveillance activities that were conducted before or after the 2016 election must be brought to light and properly addressed,” they wrote in the letter.

GOP Rep. Devin Nunes of California told Fox that the texts were showed “irregularities” in how the Russia probe began.

“This is yet more evidence that the FBI’s Trump-Russia investigation was filled with irregularities,” he said. “The more we discover about the true origins of the investigation, the more abnormal it appears in every conceivable way.”